Are you overwhelmed by the large number of Lock Parts manufacturers and Custom Lock Accessories suppliers around the world and unsure which one is right for your project? Choosing the right manufacturer is not only about the unit price. Material selection, casting or machining capability, dimensional accuracy, tooling requirements, customization, production volume, and quality control can all affect the final performance and total sourcing cost of your lock components.
This article presents the Top 10 Lock Parts Manufacturers in the World, with a practical look at their manufacturing capabilities, lock-related products, materials, industries served, and customization options. Whether you are a lock brand, architectural hardware distributor, furniture manufacturer, security equipment buyer, OEM, or industrial procurement team, this guide can help you compare suppliers more efficiently and identify manufacturers that match your specific requirements.
List of Top 10 Lock Parts Manufacturers in the World
- Junying Metal Manufacturing Co., Limited
- Ningbo Besser Casting Co., Ltd.
- JC Casting
- Shanghai Heda Castings Co., Ltd.
- Aero Metals Inc.
- China Topper Die Casting Company Limited
- Causte Hardware
- Lai To Li Co., Ltd.
- Topper Die Casting Co., LTD
- Ec Hardware Co., Ltd.
1. Junying Metal Manufacturing Co., Limited
Year Founded: 2002
Location: Dongguan, Guangdong, China
Main Products
- Zinc Die Casting Lock Parts
- Zinc Lock Bodies
- Lock Cores
- Lock Cylinders
Company Profile
Junying Metal Manufacturing Co., Limited was established in 2002 in Dongguan, Guangdong, China, and specializes in metal die casting and precision machining. Custom Lock Accessories are an important application within its zinc and aluminum die-casting business, with the company producing lock bodies, lock cores, lock cylinders, cabinet lock components, vending machine lock parts, and other customized lock components. Its production capabilities cover mold design and manufacturing, zinc and aluminum die casting, CNC machining, drilling, milling, turning, polishing, electroplating, printing, and powder coating, allowing customers to source both cast and finished components from one supplier. The company works mainly with zinc and aluminum alloys and supports OEM production based on customer drawings, samples, or specific dimensional requirements. Its lock-related components are suitable for cabinet hardware, vending equipment, furniture, security products, electronic locks, and other industrial applications.
Suitable Customers
Lock manufacturers, cabinet and furniture hardware companies, vending machine manufacturers, electronic lock brands, security hardware distributors, and OEM buyers looking for zinc die-cast lock components are suitable customer groups for Junying.
2. Ningbo Besser Casting Co., Ltd.
Year Founded: 2002
Location: Cixi, Ningbo, Zhejiang, China
Main Products
- Stainless Steel Lock Housings
- Lock Bodies
- Internal Lock Mechanisms
- Lock Keys
Company Profile
Ningbo Besser Casting Co., Ltd. traces its manufacturing history to 2002 and was formally established as the current company in 2015 in Ningbo, Zhejiang, China. Custom Lock Accessories are positioned within Besser's construction hardware casting business, where the company officially lists locks and internal lock mechanisms, lock bodies, keys, handles, hinge assemblies, and door closure units among its customized products. Its core manufacturing capability is precision investment casting, supported by wax pattern production, ceramic shell making, dewaxing, casting, cutting, grinding, heat treatment, CNC machining, surface treatment, and quality inspection. Besser works with stainless steel, carbon steel, alloy steel, tool steel, nickel alloys, and other engineering metals, and its investment casting products include stainless steel lock housings. The company serves construction hardware, architectural hardware, security equipment, automotive, hydraulic, agricultural, and other industrial sectors, while supporting customized production according to customer drawings, samples, material specifications, and functional requirements.
Suitable Customers
Lock brands, architectural hardware manufacturers, commercial door hardware companies, industrial equipment manufacturers, security hardware buyers, construction hardware distributors, and OEM customers requiring customized cast lock components can consider Besser for their projects.
3. JC Casting
Year Founded: 1997
Location: China
Main Products
- Door and Window Lock Bodies
- Deadbolts
- Strike Latches
- Locking Hooks
Company Profile
JC Casting was established in 1997 and operates as an investment casting and precision metal component manufacturer in China. Custom Lock Accessories form part of its broader construction and security hardware business, with experience producing door and window lock bodies, deadbolts, strike latches, locking hooks, and other engineered lock components for OEM customers. Its production process covers mold making, wax injection, investment casting, machining, heat treatment, surface treatment, inspection, and assembly, enabling the company to handle both complex cast geometries and post-casting precision requirements. JC Casting can process carbon steel, alloy steel, stainless steel, aluminum, and other metals, giving customers flexibility when strength, corrosion resistance, weight, or surface finish are important. The company serves door and window hardware, commercial security hardware, construction equipment, industrial machinery, and other OEM sectors, and supports customized lock components based on customer drawings, samples, and technical specifications.
Suitable Customers
Door and window hardware manufacturers, commercial security hardware companies, municipal equipment manufacturers, architectural hardware brands, industrial OEMs, and buyers requiring custom investment-cast lock components are suitable customers for JC Casting.
4. Shanghai Heda Castings Co., Ltd.
Year Founded: 2001
Location: Zhejiang, China
Main Products
- Door and Window Lock Mechanisms
- Lock Holders
- Locking Handles
- Lock-Related Hardware Castings
Company Profile
Shanghai Heda Castings Co., Ltd. was founded in 2001 and operates its precision casting production facility in Zhejiang, China, specializing in high-standard investment castings for international customers. Custom Lock Accessories are a defined application within its construction hardware business, and the company has a dedicated product range covering door and window lock mechanisms, lock holders, locking handles, and other precision lock-related castings. Its manufacturing capabilities include silica-sol investment casting, machining, fixture and checking gauge design, dimensional inspection, and 3D scanning and CMM measurement for quality control. Heda works with carbon steel, stainless steel, alloy steel, tool steel, and other engineering materials and can develop components according to customer drawings and technical requirements. Its products serve construction hardware, architectural hardware, automotive, agricultural machinery, food machinery, railway, medical equipment, and other industrial sectors, making it suitable for OEM buyers requiring customized and dimensionally controlled lock components.
Suitable Customers
Door and window hardware manufacturers, architectural hardware suppliers, lock component buyers, construction hardware OEMs, industrial distributors, and companies sourcing precision investment castings for security hardware can consider Heda Castings.
5. Aero Metals Inc.
Year Founded: 1962
Location: La Porte, Indiana, USA
Main Products
- Strike Latches
- Deadbolts
- Locking Hooks
- Lock Hardware Cylinders
Company Profile
Aero Metals Inc. was established in 1962 and is based in La Porte, Indiana, USA, with investment casting as its core manufacturing technology. Custom Lock Accessories have been an established application within its security, door, and lock hardware business since the early 1970s, with products including strike latches, deadbolts, locking hooks, spindles, cranks, latch bolts, keys, faceplates, and other custom-cast lock components. The company provides engineering, tooling, investment casting, CNC machining, finishing, and inspection services, allowing complex lock components to be developed and manufactured through an integrated production process. Aero Metals works with stainless steel, carbon and alloy steels, nickel-based alloys, aluminum, copper-based alloys, and other materials selected according to the component's mechanical and environmental requirements. Its lock components are used by commercial door hardware, security equipment, industrial, municipal, and consumer product manufacturers, and the company supports OEM projects requiring customized geometries, materials, tolerances, and production volumes.
Suitable Customers
Commercial door hardware manufacturers, security equipment OEMs, industrial lock manufacturers, municipal equipment suppliers, consumer hardware brands, and high-volume buyers of precision investment-cast components are suitable customers for Aero Metals.
6. China Topper Die Casting Company Limited
Year Founded: 2002
Location: Dongguan, Guangdong, China
Main Products
- Zamak 3 Lock Components
- Vending Machine Lock Parts
- Parking Meter Lock Parts
- Electronic Lock Components
Company Profile
China Topper Die Casting Company Limited was established in 2002 in Dongguan, Guangdong, China, and specializes in high-pressure zinc and aluminum die casting, mold manufacturing, CNC machining, and precision secondary processing. Custom Lock Accessories are a specific application within its die-casting business, with the company producing zinc alloy components for vending machine locks, parking meter locks, electronic locks, cabinet locks, padlocks, and other security hardware. Its production capabilities include tooling, die casting, CNC machining, polishing, electroplating, chrome plating, zinc plating, and powder coating, which allows buyers to obtain finished lock components rather than unfinished castings. Zamak zinc alloys and aluminum alloys are among its key materials, making the company particularly suitable for high-volume components requiring detailed shapes, repeatable dimensions, and decorative surface finishes. Its customers include vending machine manufacturers, cabinet and furniture hardware companies, electronic lock brands, parking equipment manufacturers, security product suppliers, and other OEM buyers, with customization available according to customer drawings and samples.
Suitable Customers
Vending machine manufacturers, parking equipment companies, cabinet hardware brands, electronic lock manufacturers, furniture hardware suppliers, padlock companies, and OEM buyers requiring zinc die-cast lock components are suitable customers for Topper.
7. Causte Hardware
Year Founded: 2002
Location: Zhejiang, China
Main Products
- Knob Locks
- Mortice Lock Bodies
- Mortice Lock Cylinders
- Lever Door Locks
Company Profile
Causte Hardware was established in 2002 in Zhejiang, China, and focuses on architectural door hardware and locking products for the international hardware market. Custom Lock Accessories are part of its broader door lock and hardware portfolio, with products including knob locks, mortice lock bodies, mortice lock cylinders, lever door locks, and related door hardware. Rather than concentrating only on individual raw castings, Causte provides finished hardware products and coordinated locking solutions, making its capabilities relevant to wholesalers, distributors, contractors, and private-label hardware brands. Its product portfolio uses materials including brass, stainless steel, zinc, and zinc-aluminum alloys, with manufacturing focused on producing finished components with different structural designs, materials, and surface finishes. The company serves residential construction, architectural hardware, interior design, furniture, door manufacturing, and wholesale hardware markets, and customers can discuss customized configurations, materials, finishes, dimensions, packaging, and private-label requirements for OEM projects.
Suitable Customers
Door hardware wholesalers, architectural hardware distributors, residential door manufacturers, construction contractors, furniture and interior hardware buyers, and private-label hardware brands are suitable customer groups for Causte Hardware.
8. Lai To Li Co., Ltd.
Year Founded: 1987
Location: Sanchong District, New Taipei City, Taiwan
Main Products
- Furniture Lock Cases
- Profile Cylinders
- Lock Keys
- Door Lock Components
Company Profile
Lai To Li Co., Ltd. was established in 1987 in Sanchong District, New Taipei City, Taiwan, and has more than three decades of experience in zinc alloy and aluminum alloy die casting and hardware manufacturing. Custom Lock Accessories are an established part of its business, particularly for furniture and security hardware, with products including furniture lock cases, profile cylinders, lock keys, and other door and furniture lock components. Its production capabilities cover mold design and manufacturing, zinc alloy die casting, aluminum alloy die casting, sheet-metal processing, and secondary parts processing, allowing complex housings and hardware components to be developed from customer designs. The company works with materials such as Zamak 2, Zamak 3, Zamak 5, ZA8, A380, and ADC12, giving customers different options for strength, weight, machinability, and surface finish. Its products serve furniture, safes, doors, architectural hardware, and other hardware applications, while its OEM and ODM services allow buyers to customize components according to drawings, samples, dimensions, materials, and functional requirements.
Suitable Customers
Furniture lock manufacturers, safe manufacturers, door hardware companies, architectural hardware distributors, lock brands, and OEM/ODM buyers requiring zinc or aluminum die-cast lock components are suitable customers for Lai To Li.
9. Topper Die Casting Co., LTD
Year Founded: 2004
Location: Xiamen, Fujian, China
Main Products
- Drawer Lock Parts
- Cabinet Lock Components
- Vending Machine Lock Parts
- Padlock Components
Company Profile
Topper Die Casting Co., LTD has more than 20 years of die-casting experience and is based in Xiamen, Fujian, China, with lock components forming a specific part of its metal die-casting business. Custom Lock Accessories supplied by the company include drawer lock parts, cabinet lock components, vending machine lock parts, padlock components, bicycle and motorcycle security lock parts, and other customized metal lock components. Its manufacturing capabilities cover mold making, zinc and aluminum die casting, CNC machining, secondary processing, and surface treatment, supporting both prototype development and repeat production. The company works with materials such as Zamak 3 zinc alloy, aluminum alloys, stainless steel, and spring steel depending on the lock component and its functional requirements. Its products are suitable for furniture hardware, cabinets, vending machines, bicycles, motorcycles, security products, and other industrial applications, and OEM customers can provide drawings or samples for customized tooling, dimensions, materials, finishes, and production requirements.
Suitable Customers
Furniture hardware manufacturers, cabinet companies, vending machine manufacturers, bicycle and motorcycle security product companies, padlock manufacturers, lock distributors, and OEM buyers sourcing custom die-cast lock components are suitable customers for Topper.
10. Ec Hardware Co., Ltd.
Year Founded: 2013
Location: Jiangmen, Guangdong, China
Main Products
- Stainless Steel Mortise Locks
- Stainless Steel Door Lock Bodies
- Brass Lock Cylinders
- Sliding Door Locks
Company Profile
EC Hardware Co., Ltd. was established in 2013 in Guangdong, China, and focuses on door hardware and architectural locking products for international customers. Custom Lock Accessories are positioned within its broader door hardware business, with products including stainless steel mortise locks, stainless steel door lock bodies, brass lock cylinders, sliding door locks, and other door-related locking hardware. The company emphasizes stainless steel door hardware while also using brass and other metals for specific lock components, allowing buyers to select materials according to corrosion resistance, appearance, strength, and application requirements. Its manufacturing business is oriented toward finished door hardware rather than raw castings alone, making it suitable for wholesalers, construction hardware distributors, architectural hardware retailers, door manufacturers, and private-label brands. Customers can discuss product dimensions, materials, finishes, packaging, quantities, and OEM requirements when developing customized lock hardware, with MOQ and lead time depending on the specific product and project.
Suitable Customers
Door hardware wholesalers, construction hardware distributors, architectural hardware retailers, residential door manufacturers, interior hardware buyers, private-label brands, and overseas importers sourcing complete door lock hardware can consider EC Hardware.
Frequently Asked Questions
1. How long does it usually take to develop and produce custom lock accessories?
The timeline depends heavily on whether existing tooling can be used. A simple modification to an existing component can be much faster than a completely new lock housing that requires mold development. Current industry examples show sample production of around 7–15 days for some custom lock components, while another custom lock hardware manufacturer lists 30–45 days for its overall delivery time. These figures should be treated as project references rather than guarantees. Before placing an order, ask the manufacturer to separate the timeline into engineering/DFM, tooling, first sample, sample approval, mass production, and surface treatment. This makes it much easier to identify where a delay could occur.
2. Should I order samples before placing a large order for custom lock accessories?
For a new custom component, a sample or first article is strongly recommended before committing to full production. The purpose is not only to check appearance; you should test whether the part actually fits the mating components, whether the lock operates smoothly, whether mounting holes and dimensions are correct, and whether the surface finish meets your requirements. If the component uses a cylinder or key system, test the actual keying function as well. After approval, ask the manufacturer to freeze the approved drawing revision, material specification, finish, and critical dimensions before mass production. This reduces the risk of a situation where the prototype works but the production version changes because the manufacturing specification was not clearly documented.
3. Can a manufacturer make custom lock parts from a physical sample instead of a CAD drawing?
Yes, many custom metal-part manufacturers can use a physical sample as a reference, but the sample should be accompanied by as much information as possible. A manufacturer can measure the sample and develop a drawing or manufacturing process around it, but hidden dimensions, internal geometry, material grade, hardness, and functional tolerances cannot always be determined from the sample alone. If the lock accessory must work with an existing cylinder, latch, cam, spring, or housing, provide the mating part as well if possible. This gives the engineering team a better basis for checking fit before tooling is started. Some current custom lock suppliers explicitly accept 2D drawings, 3D CAD files, or reference samples for development.
4. What is a reasonable MOQ for custom lock accessories?
There is no single MOQ that applies to every custom lock accessory. A simple modified component may require a lower quantity than a completely new die-cast housing with dedicated tooling, machining, plating, and assembly. As a practical reference, one current custom lock-cylinder supplier lists an MOQ starting at 1,000 pieces, while other manufacturers state that MOQ varies according to the product and customization level. If you are developing a new product, ask the manufacturer to quote separately for prototype/sample quantity, pilot quantity, and mass-production quantity. This can be more useful than asking only “What is your MOQ?” because tooling and production economics can change significantly between these stages.
5. Which material should I choose for custom lock accessories: zinc alloy, stainless steel, aluminum, or brass?
The right material depends on the function and environment of the part rather than simply choosing the most expensive option. Zinc alloy is commonly considered for compact die-cast housings and high-volume components where complex shapes and surface finish are important. Stainless steel is more suitable when corrosion resistance and structural durability are important, particularly for exposed or demanding environments. Aluminum can be useful when lower weight and corrosion resistance are required. Brass is commonly used for components such as cylinders and other hardware where its machining and appearance are advantageous. For outdoor, coastal, high-cycle, or security-sensitive applications, tell the manufacturer the actual operating environment rather than specifying only a material name; the supplier can then assess whether the proposed material and finish are appropriate.
Conclusion
If your project requires custom lock housings, lock bodies, internal lock mechanisms, keys, or other metal lock components, Ningbo Besser Casting Co., Ltd. is worth contacting for a project-specific assessment. Besser officially lists locks, internal lock mechanisms, lock bodies, and keys within its construction hardware casting capabilities and also displays stainless steel lock housing among its investment casting products. Its investment casting, CNC machining, heat treatment, surface finishing, and inspection capabilities allow buyers to discuss the manufacturing route around the actual part requirements rather than choosing a process first.
For your next Custom Lock Accessories project, you can send Besser your drawing, sample, material requirement, estimated quantity, tolerance requirements, and surface finish specifications. Their engineering team can then evaluate the appropriate casting and machining route and provide a project-specific quotation.